Tire rivet



April 14, 1942.

y QPFEIFER TIRE RIVET Filed May 8, 1940 INVENTOR CA2@ PPE/FE@ `BYATTRNEY Patented pr. 14, 1942 UNITED STATES PTENT` OFFICEI TIRE RiverCarl Pfeifer, Milwaukee, Wis. Y Application May 8, 1940, Serial No.333,891

1 Claim.

other devices of the type now in use.

Another object of the invention is to provide a patch separate from thebase and stem ofthe rivet, and which can be made of similar materialhaving a relatively greater resistance to stresses and strains.

IOther and further objects lof the invention will appear as thedescription proceeds, reference bepatched in a manner which is notpossible with y ing had to the accompanying drawing, in which:

Fig. 1 is a view partly in section and partly in elevation of a tirerivet embodying my invention.

Fig. 2 `is a side view in `elevation of the integral l base and stem ofthe rivet.

Fig. 3 is a plan View',` of a large patch showing the off-center moldedaperture therein.

Fig. 4 is a plan view of the smaller centrally apertured patch. y y

Fig. 5 is a side view in section of the large patch.

Fig. 6 is a side sectional view of the smaller patch.

Referring more particularly to the drawing, the numeral I0 refers to thebase of the device, having a stem I I, apertured at I2 to accommodatethe twisted pull wire I3.

In one form of the invention a circularpatch member I4, having theconcentric ribs I5 and thecentral aperture I6 is placed on the stem I Iso as to abut against the base I0.

In another form ofthe invention the patch is oval and relatively largeras shown in Fig. 3 of the drawing, the said patch being designated bythe numeral I1, having the oir-center aperture at I8 thereof, and thesymmetrically intersecting ribs I9 on the contact face thereof.

The patches I4 and Il may be constructed of material similar to thatforming the integral stem and base, but the material forming the patchesin the preferred form of the invention is of a stronger quality andcharacter. The stem has to be formed of an elastic substance in order tostretch properly as it is pulled through the hole or break in thearticle, such as a tire casing, to be repaired. The integral base mustnecessarily be constructed of the same elastic material, and while inthe case of a small hole the base itself might provide a suitableclosure, it has `been found that the extra patch II forms a moreadequate repair, inasmuch as the latter can be formed of a more rigidmaterial.

In use, the patch I4 and the stem I I are covered with rubber cement,and the pull wire I3 is pushed throughthe puncture hole in a tirecasing` from the inside. The stem II is pulled through until the ribbedand cemented side of the patch I 4 is held tightly in place against theinside of the tire. AThe stem is then cut off adjacent to the outside ofthe casing 20, where because of its elastic character it forms the rivetend 2 I.

Incase of a large break in a tire casing, the oval patch Il having theoff-center aperture is used. First a hole is punched in the casing nearthe break to be repaired, and the stem is pulled therethrough, while thepatch is adjusted so that its center will cover the break. Apertures I6and I8 are molded in the patches III and Il, and are thus better able towithstand the expansive pressure of the stem I I.

It will be understood that the device is capable of variousmodifications in structure and design, without departing from the spiritof the invention, within the scope of the appended claim.

Having thus described the invention, what is claimedand desired to besecured by Letters Patent of the United States, is:

